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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/block/acsi_slm.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/block/acsi_slm.c')
-rw-r--r--drivers/block/acsi_slm.c1045
1 files changed, 1045 insertions, 0 deletions
diff --git a/drivers/block/acsi_slm.c b/drivers/block/acsi_slm.c
new file mode 100644
index 000000000000..e3be8c31a74c
--- /dev/null
+++ b/drivers/block/acsi_slm.c
@@ -0,0 +1,1045 @@
+/*
+ * acsi_slm.c -- Device driver for the Atari SLM laser printer
+ *
+ * Copyright 1995 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive for
+ * more details.
+ *
+ */
+
+/*
+
+Notes:
+
+The major number for SLM printers is 28 (like ACSI), but as a character
+device, not block device. The minor number is the number of the printer (if
+you have more than one SLM; currently max. 2 (#define-constant) SLMs are
+supported). The device can be opened for reading and writing. If reading it,
+you get some status infos (MODE SENSE data). Writing mode is used for the data
+to be printed. Some ioctls allow to get the printer status and to tune printer
+modes and some internal variables.
+
+A special problem of the SLM driver is the timing and thus the buffering of
+the print data. The problem is that all the data for one page must be present
+in memory when printing starts, else --when swapping occurs-- the timing could
+not be guaranteed. There are several ways to assure this:
+
+ 1) Reserve a buffer of 1196k (maximum page size) statically by
+ atari_stram_alloc(). The data are collected there until they're complete,
+ and then printing starts. Since the buffer is reserved, no further
+ considerations about memory and swapping are needed. So this is the
+ simplest method, but it needs a lot of memory for just the SLM.
+
+ An striking advantage of this method is (supposed the SLM_CONT_CNT_REPROG
+ method works, see there), that there are no timing problems with the DMA
+ anymore.
+
+ 2) The other method would be to reserve the buffer dynamically each time
+ printing is required. I could think of looking at mem_map where the
+ largest unallocted ST-RAM area is, taking the area, and then extending it
+ by swapping out the neighbored pages, until the needed size is reached.
+ This requires some mm hacking, but seems possible. The only obstacle could
+ be pages that cannot be swapped out (reserved pages)...
+
+ 3) Another possibility would be to leave the real data in user space and to
+ work with two dribble buffers of about 32k in the driver: While the one
+ buffer is DMAed to the SLM, the other can be filled with new data. But
+ to keep the timing, that requires that the user data remain in memory and
+ are not swapped out. Requires mm hacking, too, but maybe not so bad as
+ method 2).
+
+*/
+
+#include <linux/module.h>
+
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/fs.h>
+#include <linux/major.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/time.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/devfs_fs_kernel.h>
+#include <linux/smp_lock.h>
+
+#include <asm/pgtable.h>
+#include <asm/system.h>
+#include <asm/uaccess.h>
+#include <asm/atarihw.h>
+#include <asm/atariints.h>
+#include <asm/atari_acsi.h>
+#include <asm/atari_stdma.h>
+#include <asm/atari_stram.h>
+#include <asm/atari_SLM.h>
+
+
+#undef DEBUG
+
+/* Define this if the page data are continuous in physical memory. That
+ * requires less reprogramming of the ST-DMA */
+#define SLM_CONTINUOUS_DMA
+
+/* Use continuous reprogramming of the ST-DMA counter register. This is
+ * --strictly speaking-- not allowed, Atari recommends not to look at the
+ * counter register while a DMA is going on. But I don't know if that applies
+ * only for reading the register, or also writing to it. Writing only works
+ * fine for me... The advantage is that the timing becomes absolutely
+ * uncritical: Just update each, say 200ms, the counter reg to its maximum,
+ * and the DMA will work until the status byte interrupt occurs.
+ */
+#define SLM_CONT_CNT_REPROG
+
+#define CMDSET_TARG_LUN(cmd,targ,lun) \
+ do { \
+ cmd[0] = (cmd[0] & ~0xe0) | (targ)<<5; \
+ cmd[1] = (cmd[1] & ~0xe0) | (lun)<<5; \
+ } while(0)
+
+#define START_TIMER(to) mod_timer(&slm_timer, jiffies + (to))
+#define STOP_TIMER() del_timer(&slm_timer)
+
+
+static char slmreqsense_cmd[6] = { 0x03, 0, 0, 0, 0, 0 };
+static char slmprint_cmd[6] = { 0x0a, 0, 0, 0, 0, 0 };
+static char slminquiry_cmd[6] = { 0x12, 0, 0, 0, 0, 0x80 };
+static char slmmsense_cmd[6] = { 0x1a, 0, 0, 0, 255, 0 };
+#if 0
+static char slmmselect_cmd[6] = { 0x15, 0, 0, 0, 0, 0 };
+#endif
+
+
+#define MAX_SLM 2
+
+static struct slm {
+ unsigned target; /* target number */
+ unsigned lun; /* LUN in target controller */
+ atomic_t wr_ok; /* set to 0 if output part busy */
+ atomic_t rd_ok; /* set to 0 if status part busy */
+} slm_info[MAX_SLM];
+
+int N_SLM_Printers = 0;
+
+/* printer buffer */
+static unsigned char *SLMBuffer; /* start of buffer */
+static unsigned char *BufferP; /* current position in buffer */
+static int BufferSize; /* length of buffer for page size */
+
+typedef enum { IDLE, FILLING, PRINTING } SLMSTATE;
+static SLMSTATE SLMState;
+static int SLMBufOwner; /* SLM# currently using the buffer */
+
+/* DMA variables */
+#ifndef SLM_CONT_CNT_REPROG
+static unsigned long SLMCurAddr; /* current base addr of DMA chunk */
+static unsigned long SLMEndAddr; /* expected end addr */
+static unsigned long SLMSliceSize; /* size of one DMA chunk */
+#endif
+static int SLMError;
+
+/* wait queues */
+static DECLARE_WAIT_QUEUE_HEAD(slm_wait); /* waiting for buffer */
+static DECLARE_WAIT_QUEUE_HEAD(print_wait); /* waiting for printing finished */
+
+/* status codes */
+#define SLMSTAT_OK 0x00
+#define SLMSTAT_ORNERY 0x02
+#define SLMSTAT_TONER 0x03
+#define SLMSTAT_WARMUP 0x04
+#define SLMSTAT_PAPER 0x05
+#define SLMSTAT_DRUM 0x06
+#define SLMSTAT_INJAM 0x07
+#define SLMSTAT_THRJAM 0x08
+#define SLMSTAT_OUTJAM 0x09
+#define SLMSTAT_COVER 0x0a
+#define SLMSTAT_FUSER 0x0b
+#define SLMSTAT_IMAGER 0x0c
+#define SLMSTAT_MOTOR 0x0d
+#define SLMSTAT_VIDEO 0x0e
+#define SLMSTAT_SYSTO 0x10
+#define SLMSTAT_OPCODE 0x12
+#define SLMSTAT_DEVNUM 0x15
+#define SLMSTAT_PARAM 0x1a
+#define SLMSTAT_ACSITO 0x1b /* driver defined */
+#define SLMSTAT_NOTALL 0x1c /* driver defined */
+
+static char *SLMErrors[] = {
+ /* 0x00 */ "OK and ready",
+ /* 0x01 */ NULL,
+ /* 0x02 */ "ornery printer",
+ /* 0x03 */ "toner empty",
+ /* 0x04 */ "warming up",
+ /* 0x05 */ "paper empty",
+ /* 0x06 */ "drum empty",
+ /* 0x07 */ "input jam",
+ /* 0x08 */ "through jam",
+ /* 0x09 */ "output jam",
+ /* 0x0a */ "cover open",
+ /* 0x0b */ "fuser malfunction",
+ /* 0x0c */ "imager malfunction",
+ /* 0x0d */ "motor malfunction",
+ /* 0x0e */ "video malfunction",
+ /* 0x0f */ NULL,
+ /* 0x10 */ "printer system timeout",
+ /* 0x11 */ NULL,
+ /* 0x12 */ "invalid operation code",
+ /* 0x13 */ NULL,
+ /* 0x14 */ NULL,
+ /* 0x15 */ "invalid device number",
+ /* 0x16 */ NULL,
+ /* 0x17 */ NULL,
+ /* 0x18 */ NULL,
+ /* 0x19 */ NULL,
+ /* 0x1a */ "invalid parameter list",
+ /* 0x1b */ "ACSI timeout",
+ /* 0x1c */ "not all printed"
+};
+
+#define N_ERRORS (sizeof(SLMErrors)/sizeof(*SLMErrors))
+
+/* real (driver caused) error? */
+#define IS_REAL_ERROR(x) (x > 0x10)
+
+
+static struct {
+ char *name;
+ int w, h;
+} StdPageSize[] = {
+ { "Letter", 2400, 3180 },
+ { "Legal", 2400, 4080 },
+ { "A4", 2336, 3386 },
+ { "B5", 2016, 2914 }
+};
+
+#define N_STD_SIZES (sizeof(StdPageSize)/sizeof(*StdPageSize))
+
+#define SLM_BUFFER_SIZE (2336*3386/8) /* A4 for now */
+#define SLM_DMA_AMOUNT 255 /* #sectors to program the DMA for */
+
+#ifdef SLM_CONTINUOUS_DMA
+# define SLM_DMA_INT_OFFSET 0 /* DMA goes until seccnt 0, no offs */
+# define SLM_DMA_END_OFFSET 32 /* 32 Byte ST-DMA FIFO */
+# define SLM_SLICE_SIZE(w) (255*512)
+#else
+# define SLM_DMA_INT_OFFSET 32 /* 32 Byte ST-DMA FIFO */
+# define SLM_DMA_END_OFFSET 32 /* 32 Byte ST-DMA FIFO */
+# define SLM_SLICE_SIZE(w) ((254*512)/(w/8)*(w/8))
+#endif
+
+/* calculate the number of jiffies to wait for 'n' bytes */
+#ifdef SLM_CONT_CNT_REPROG
+#define DMA_TIME_FOR(n) 50
+#define DMA_STARTUP_TIME 0
+#else
+#define DMA_TIME_FOR(n) (n/1400-1)
+#define DMA_STARTUP_TIME 650
+#endif
+
+/***************************** Prototypes *****************************/
+
+static char *slm_errstr( int stat );
+static int slm_getstats( char *buffer, int device );
+static ssize_t slm_read( struct file* file, char *buf, size_t count, loff_t
+ *ppos );
+static void start_print( int device );
+static irqreturn_t slm_interrupt(int irc, void *data, struct pt_regs *fp);
+static void slm_test_ready( unsigned long dummy );
+static void set_dma_addr( unsigned long paddr );
+static unsigned long get_dma_addr( void );
+static ssize_t slm_write( struct file *file, const char *buf, size_t count,
+ loff_t *ppos );
+static int slm_ioctl( struct inode *inode, struct file *file, unsigned int
+ cmd, unsigned long arg );
+static int slm_open( struct inode *inode, struct file *file );
+static int slm_release( struct inode *inode, struct file *file );
+static int slm_req_sense( int device );
+static int slm_mode_sense( int device, char *buffer, int abs_flag );
+#if 0
+static int slm_mode_select( int device, char *buffer, int len, int
+ default_flag );
+#endif
+static int slm_get_pagesize( int device, int *w, int *h );
+
+/************************* End of Prototypes **************************/
+
+
+static struct timer_list slm_timer = TIMER_INITIALIZER(slm_test_ready, 0, 0);
+
+static struct file_operations slm_fops = {
+ .owner = THIS_MODULE,
+ .read = slm_read,
+ .write = slm_write,
+ .ioctl = slm_ioctl,
+ .open = slm_open,
+ .release = slm_release,
+};
+
+
+/* ---------------------------------------------------------------------- */
+/* Status Functions */
+
+
+static char *slm_errstr( int stat )
+
+{ char *p;
+ static char str[22];
+
+ stat &= 0x1f;
+ if (stat >= 0 && stat < N_ERRORS && (p = SLMErrors[stat]))
+ return( p );
+ sprintf( str, "unknown status 0x%02x", stat );
+ return( str );
+}
+
+
+static int slm_getstats( char *buffer, int device )
+
+{ int len = 0, stat, i, w, h;
+ unsigned char buf[256];
+
+ stat = slm_mode_sense( device, buf, 0 );
+ if (IS_REAL_ERROR(stat))
+ return( -EIO );
+
+#define SHORTDATA(i) ((buf[i] << 8) | buf[i+1])
+#define BOOLDATA(i,mask) ((buf[i] & mask) ? "on" : "off")
+
+ w = SHORTDATA( 3 );
+ h = SHORTDATA( 1 );
+
+ len += sprintf( buffer+len, "Status\t\t%s\n",
+ slm_errstr( stat ) );
+ len += sprintf( buffer+len, "Page Size\t%dx%d",
+ w, h );
+
+ for( i = 0; i < N_STD_SIZES; ++i ) {
+ if (w == StdPageSize[i].w && h == StdPageSize[i].h)
+ break;
+ }
+ if (i < N_STD_SIZES)
+ len += sprintf( buffer+len, " (%s)", StdPageSize[i].name );
+ buffer[len++] = '\n';
+
+ len += sprintf( buffer+len, "Top/Left Margin\t%d/%d\n",
+ SHORTDATA( 5 ), SHORTDATA( 7 ) );
+ len += sprintf( buffer+len, "Manual Feed\t%s\n",
+ BOOLDATA( 9, 0x01 ) );
+ len += sprintf( buffer+len, "Input Select\t%d\n",
+ (buf[9] >> 1) & 7 );
+ len += sprintf( buffer+len, "Auto Select\t%s\n",
+ BOOLDATA( 9, 0x10 ) );
+ len += sprintf( buffer+len, "Prefeed Paper\t%s\n",
+ BOOLDATA( 9, 0x20 ) );
+ len += sprintf( buffer+len, "Thick Pixels\t%s\n",
+ BOOLDATA( 9, 0x40 ) );
+ len += sprintf( buffer+len, "H/V Resol.\t%d/%d dpi\n",
+ SHORTDATA( 12 ), SHORTDATA( 10 ) );
+ len += sprintf( buffer+len, "System Timeout\t%d\n",
+ buf[14] );
+ len += sprintf( buffer+len, "Scan Time\t%d\n",
+ SHORTDATA( 15 ) );
+ len += sprintf( buffer+len, "Page Count\t%d\n",
+ SHORTDATA( 17 ) );
+ len += sprintf( buffer+len, "In/Out Cap.\t%d/%d\n",
+ SHORTDATA( 19 ), SHORTDATA( 21 ) );
+ len += sprintf( buffer+len, "Stagger Output\t%s\n",
+ BOOLDATA( 23, 0x01 ) );
+ len += sprintf( buffer+len, "Output Select\t%d\n",
+ (buf[23] >> 1) & 7 );
+ len += sprintf( buffer+len, "Duplex Print\t%s\n",
+ BOOLDATA( 23, 0x10 ) );
+ len += sprintf( buffer+len, "Color Sep.\t%s\n",
+ BOOLDATA( 23, 0x20 ) );
+
+ return( len );
+}
+
+
+static ssize_t slm_read( struct file *file, char *buf, size_t count,
+ loff_t *ppos )
+
+{
+ struct inode *node = file->f_dentry->d_inode;
+ unsigned long page;
+ int length;
+ int end;
+
+ if (count < 0)
+ return( -EINVAL );
+ if (!(page = __get_free_page( GFP_KERNEL )))
+ return( -ENOMEM );
+
+ length = slm_getstats( (char *)page, iminor(node) );
+ if (length < 0) {
+ count = length;
+ goto out;
+ }
+ if (file->f_pos >= length) {
+ count = 0;
+ goto out;
+ }
+ if (count + file->f_pos > length)
+ count = length - file->f_pos;
+ end = count + file->f_pos;
+ if (copy_to_user(buf, (char *)page + file->f_pos, count)) {
+ count = -EFAULT;
+ goto out;
+ }
+ file->f_pos = end;
+out: free_page( page );
+ return( count );
+}
+
+
+/* ---------------------------------------------------------------------- */
+/* Printing */
+
+
+static void start_print( int device )
+
+{ struct slm *sip = &slm_info[device];
+ unsigned char *cmd;
+ unsigned long paddr;
+ int i;
+
+ stdma_lock( slm_interrupt, NULL );
+
+ CMDSET_TARG_LUN( slmprint_cmd, sip->target, sip->lun );
+ cmd = slmprint_cmd;
+ paddr = virt_to_phys( SLMBuffer );
+ dma_cache_maintenance( paddr, virt_to_phys(BufferP)-paddr, 1 );
+ DISABLE_IRQ();
+
+ /* Low on A1 */
+ dma_wd.dma_mode_status = 0x88;
+ MFPDELAY();
+
+ /* send the command bytes except the last */
+ for( i = 0; i < 5; ++i ) {
+ DMA_LONG_WRITE( *cmd++, 0x8a );
+ udelay(20);
+ if (!acsi_wait_for_IRQ( HZ/2 )) {
+ SLMError = 1;
+ return; /* timeout */
+ }
+ }
+ /* last command byte */
+ DMA_LONG_WRITE( *cmd++, 0x82 );
+ MFPDELAY();
+ /* set DMA address */
+ set_dma_addr( paddr );
+ /* program DMA for write and select sector counter reg */
+ dma_wd.dma_mode_status = 0x192;
+ MFPDELAY();
+ /* program for 255*512 bytes and start DMA */
+ DMA_LONG_WRITE( SLM_DMA_AMOUNT, 0x112 );
+
+#ifndef SLM_CONT_CNT_REPROG
+ SLMCurAddr = paddr;
+ SLMEndAddr = paddr + SLMSliceSize + SLM_DMA_INT_OFFSET;
+#endif
+ START_TIMER( DMA_STARTUP_TIME + DMA_TIME_FOR( SLMSliceSize ));
+#if !defined(SLM_CONT_CNT_REPROG) && defined(DEBUG)
+ printk( "SLM: CurAddr=%#lx EndAddr=%#lx timer=%ld\n",
+ SLMCurAddr, SLMEndAddr, DMA_TIME_FOR( SLMSliceSize ) );
+#endif
+
+ ENABLE_IRQ();
+}
+
+
+/* Only called when an error happened or at the end of a page */
+
+static irqreturn_t slm_interrupt(int irc, void *data, struct pt_regs *fp)
+
+{ unsigned long addr;
+ int stat;
+
+ STOP_TIMER();
+ addr = get_dma_addr();
+ stat = acsi_getstatus();
+ SLMError = (stat < 0) ? SLMSTAT_ACSITO :
+ (addr < virt_to_phys(BufferP)) ? SLMSTAT_NOTALL :
+ stat;
+
+ dma_wd.dma_mode_status = 0x80;
+ MFPDELAY();
+#ifdef DEBUG
+ printk( "SLM: interrupt, addr=%#lx, error=%d\n", addr, SLMError );
+#endif
+
+ wake_up( &print_wait );
+ stdma_release();
+ ENABLE_IRQ();
+ return IRQ_HANDLED;
+}
+
+
+static void slm_test_ready( unsigned long dummy )
+
+{
+#ifdef SLM_CONT_CNT_REPROG
+ /* program for 255*512 bytes again */
+ dma_wd.fdc_acces_seccount = SLM_DMA_AMOUNT;
+ START_TIMER( DMA_TIME_FOR(0) );
+#ifdef DEBUG
+ printk( "SLM: reprogramming timer for %d jiffies, addr=%#lx\n",
+ DMA_TIME_FOR(0), get_dma_addr() );
+#endif
+
+#else /* !SLM_CONT_CNT_REPROG */
+
+ unsigned long flags, addr;
+ int d, ti;
+#ifdef DEBUG
+ struct timeval start_tm, end_tm;
+ int did_wait = 0;
+#endif
+
+ local_irq_save(flags);
+
+ addr = get_dma_addr();
+ if ((d = SLMEndAddr - addr) > 0) {
+ local_irq_restore(flags);
+
+ /* slice not yet finished, decide whether to start another timer or to
+ * busy-wait */
+ ti = DMA_TIME_FOR( d );
+ if (ti > 0) {
+#ifdef DEBUG
+ printk( "SLM: reprogramming timer for %d jiffies, rest %d bytes\n",
+ ti, d );
+#endif
+ START_TIMER( ti );
+ return;
+ }
+ /* wait for desired end address to be reached */
+#ifdef DEBUG
+ do_gettimeofday( &start_tm );
+ did_wait = 1;
+#endif
+ local_irq_disable();
+ while( get_dma_addr() < SLMEndAddr )
+ barrier();
+ }
+
+ /* slice finished, start next one */
+ SLMCurAddr += SLMSliceSize;
+
+#ifdef SLM_CONTINUOUS_DMA
+ /* program for 255*512 bytes again */
+ dma_wd.fdc_acces_seccount = SLM_DMA_AMOUNT;
+#else
+ /* set DMA address;
+ * add 2 bytes for the ones in the SLM controller FIFO! */
+ set_dma_addr( SLMCurAddr + 2 );
+ /* toggle DMA to write and select sector counter reg */
+ dma_wd.dma_mode_status = 0x92;
+ MFPDELAY();
+ dma_wd.dma_mode_status = 0x192;
+ MFPDELAY();
+ /* program for 255*512 bytes and start DMA */
+ DMA_LONG_WRITE( SLM_DMA_AMOUNT, 0x112 );
+#endif
+
+ local_irq_restore(flags);
+
+#ifdef DEBUG
+ if (did_wait) {
+ int ms;
+ do_gettimeofday( &end_tm );
+ ms = (end_tm.tv_sec*1000000+end_tm.tv_usec) -
+ (start_tm.tv_sec*1000000+start_tm.tv_usec);
+ printk( "SLM: did %ld.%ld ms busy waiting for %d bytes\n",
+ ms/1000, ms%1000, d );
+ }
+ else
+ printk( "SLM: didn't wait (!)\n" );
+#endif
+
+ if ((unsigned char *)PTOV( SLMCurAddr + SLMSliceSize ) >= BufferP) {
+ /* will be last slice, no timer necessary */
+#ifdef DEBUG
+ printk( "SLM: CurAddr=%#lx EndAddr=%#lx last slice -> no timer\n",
+ SLMCurAddr, SLMEndAddr );
+#endif
+ }
+ else {
+ /* not last slice */
+ SLMEndAddr = SLMCurAddr + SLMSliceSize + SLM_DMA_INT_OFFSET;
+ START_TIMER( DMA_TIME_FOR( SLMSliceSize ));
+#ifdef DEBUG
+ printk( "SLM: CurAddr=%#lx EndAddr=%#lx timer=%ld\n",
+ SLMCurAddr, SLMEndAddr, DMA_TIME_FOR( SLMSliceSize ) );
+#endif
+ }
+#endif /* SLM_CONT_CNT_REPROG */
+}
+
+
+static void set_dma_addr( unsigned long paddr )
+
+{ unsigned long flags;
+
+ local_irq_save(flags);
+ dma_wd.dma_lo = (unsigned char)paddr;
+ paddr >>= 8;
+ MFPDELAY();
+ dma_wd.dma_md = (unsigned char)paddr;
+ paddr >>= 8;
+ MFPDELAY();
+ if (ATARIHW_PRESENT( EXTD_DMA ))
+ st_dma_ext_dmahi = (unsigned short)paddr;
+ else
+ dma_wd.dma_hi = (unsigned char)paddr;
+ MFPDELAY();
+ local_irq_restore(flags);
+}
+
+
+static unsigned long get_dma_addr( void )
+
+{ unsigned long addr;
+
+ addr = dma_wd.dma_lo & 0xff;
+ MFPDELAY();
+ addr |= (dma_wd.dma_md & 0xff) << 8;
+ MFPDELAY();
+ addr |= (dma_wd.dma_hi & 0xff) << 16;
+ MFPDELAY();
+
+ return( addr );
+}
+
+
+static ssize_t slm_write( struct file *file, const char *buf, size_t count,
+ loff_t *ppos )
+
+{
+ struct inode *node = file->f_dentry->d_inode;
+ int device = iminor(node);
+ int n, filled, w, h;
+
+ while( SLMState == PRINTING ||
+ (SLMState == FILLING && SLMBufOwner != device) ) {
+ interruptible_sleep_on( &slm_wait );
+ if (signal_pending(current))
+ return( -ERESTARTSYS );
+ }
+ if (SLMState == IDLE) {
+ /* first data of page: get current page size */
+ if (slm_get_pagesize( device, &w, &h ))
+ return( -EIO );
+ BufferSize = w*h/8;
+ if (BufferSize > SLM_BUFFER_SIZE)
+ return( -ENOMEM );
+
+ SLMState = FILLING;
+ SLMBufOwner = device;
+ }
+
+ n = count;
+ filled = BufferP - SLMBuffer;
+ if (filled + n > BufferSize)
+ n = BufferSize - filled;
+
+ if (copy_from_user(BufferP, buf, n))
+ return -EFAULT;
+ BufferP += n;
+ filled += n;
+
+ if (filled == BufferSize) {
+ /* Check the paper size again! The user may have switched it in the
+ * time between starting the data and finishing them. Would end up in
+ * a trashy page... */
+ if (slm_get_pagesize( device, &w, &h ))
+ return( -EIO );
+ if (BufferSize != w*h/8) {
+ printk( KERN_NOTICE "slm%d: page size changed while printing\n",
+ device );
+ return( -EAGAIN );
+ }
+
+ SLMState = PRINTING;
+ /* choose a slice size that is a multiple of the line size */
+#ifndef SLM_CONT_CNT_REPROG
+ SLMSliceSize = SLM_SLICE_SIZE(w);
+#endif
+
+ start_print( device );
+ sleep_on( &print_wait );
+ if (SLMError && IS_REAL_ERROR(SLMError)) {
+ printk( KERN_ERR "slm%d: %s\n", device, slm_errstr(SLMError) );
+ n = -EIO;
+ }
+
+ SLMState = IDLE;
+ BufferP = SLMBuffer;
+ wake_up_interruptible( &slm_wait );
+ }
+
+ return( n );
+}
+
+
+/* ---------------------------------------------------------------------- */
+/* ioctl Functions */
+
+
+static int slm_ioctl( struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg )
+
+{ int device = iminor(inode), err;
+
+ /* I can think of setting:
+ * - manual feed
+ * - paper format
+ * - copy count
+ * - ...
+ * but haven't implemented that yet :-)
+ * BTW, has anybody better docs about the MODE SENSE/MODE SELECT data?
+ */
+ switch( cmd ) {
+
+ case SLMIORESET: /* reset buffer, i.e. empty the buffer */
+ if (!(file->f_mode & 2))
+ return( -EINVAL );
+ if (SLMState == PRINTING)
+ return( -EBUSY );
+ SLMState = IDLE;
+ BufferP = SLMBuffer;
+ wake_up_interruptible( &slm_wait );
+ return( 0 );
+
+ case SLMIOGSTAT: { /* get status */
+ int stat;
+ char *str;
+
+ stat = slm_req_sense( device );
+ if (arg) {
+ str = slm_errstr( stat );
+ if (put_user(stat,
+ (long *)&((struct SLM_status *)arg)->stat))
+ return -EFAULT;
+ if (copy_to_user( ((struct SLM_status *)arg)->str, str,
+ strlen(str) + 1))
+ return -EFAULT;
+ }
+ return( stat );
+ }
+
+ case SLMIOGPSIZE: { /* get paper size */
+ int w, h;
+
+ if ((err = slm_get_pagesize( device, &w, &h ))) return( err );
+
+ if (put_user(w, (long *)&((struct SLM_paper_size *)arg)->width))
+ return -EFAULT;
+ if (put_user(h, (long *)&((struct SLM_paper_size *)arg)->height))
+ return -EFAULT;
+ return( 0 );
+ }
+
+ case SLMIOGMFEED: /* get manual feed */
+ return( -EINVAL );
+
+ case SLMIOSPSIZE: /* set paper size */
+ return( -EINVAL );
+
+ case SLMIOSMFEED: /* set manual feed */
+ return( -EINVAL );
+
+ }
+ return( -EINVAL );
+}
+
+
+/* ---------------------------------------------------------------------- */
+/* Opening and Closing */
+
+
+static int slm_open( struct inode *inode, struct file *file )
+
+{ int device;
+ struct slm *sip;
+
+ device = iminor(inode);
+ if (device >= N_SLM_Printers)
+ return( -ENXIO );
+ sip = &slm_info[device];
+
+ if (file->f_mode & 2) {
+ /* open for writing is exclusive */
+ if ( !atomic_dec_and_test(&sip->wr_ok) ) {
+ atomic_inc(&sip->wr_ok);
+ return( -EBUSY );
+ }
+ }
+ if (file->f_mode & 1) {
+ /* open for reading is exclusive */
+ if ( !atomic_dec_and_test(&sip->rd_ok) ) {
+ atomic_inc(&sip->rd_ok);
+ return( -EBUSY );
+ }
+ }
+
+ return( 0 );
+}
+
+
+static int slm_release( struct inode *inode, struct file *file )
+
+{ int device;
+ struct slm *sip;
+
+ device = iminor(inode);
+ sip = &slm_info[device];
+
+ if (file->f_mode & 2)
+ atomic_inc( &sip->wr_ok );
+ if (file->f_mode & 1)
+ atomic_inc( &sip->rd_ok );
+
+ return( 0 );
+}
+
+
+/* ---------------------------------------------------------------------- */
+/* ACSI Primitives for the SLM */
+
+
+static int slm_req_sense( int device )
+
+{ int stat, rv;
+ struct slm *sip = &slm_info[device];
+
+ stdma_lock( NULL, NULL );
+
+ CMDSET_TARG_LUN( slmreqsense_cmd, sip->target, sip->lun );
+ if (!acsicmd_nodma( slmreqsense_cmd, 0 ) ||
+ (stat = acsi_getstatus()) < 0)
+ rv = SLMSTAT_ACSITO;
+ else
+ rv = stat & 0x1f;
+
+ ENABLE_IRQ();
+ stdma_release();
+ return( rv );
+}
+
+
+static int slm_mode_sense( int device, char *buffer, int abs_flag )
+
+{ unsigned char stat, len;
+ int rv = 0;
+ struct slm *sip = &slm_info[device];
+
+ stdma_lock( NULL, NULL );
+
+ CMDSET_TARG_LUN( slmmsense_cmd, sip->target, sip->lun );
+ slmmsense_cmd[5] = abs_flag ? 0x80 : 0;
+ if (!acsicmd_nodma( slmmsense_cmd, 0 )) {
+ rv = SLMSTAT_ACSITO;
+ goto the_end;
+ }
+
+ if (!acsi_extstatus( &stat, 1 )) {
+ acsi_end_extstatus();
+ rv = SLMSTAT_ACSITO;
+ goto the_end;
+ }
+
+ if (!acsi_extstatus( &len, 1 )) {
+ acsi_end_extstatus();
+ rv = SLMSTAT_ACSITO;
+ goto the_end;
+ }
+ buffer[0] = len;
+ if (!acsi_extstatus( buffer+1, len )) {
+ acsi_end_extstatus();
+ rv = SLMSTAT_ACSITO;
+ goto the_end;
+ }
+
+ acsi_end_extstatus();
+ rv = stat & 0x1f;
+
+ the_end:
+ ENABLE_IRQ();
+ stdma_release();
+ return( rv );
+}
+
+
+#if 0
+/* currently unused */
+static int slm_mode_select( int device, char *buffer, int len,
+ int default_flag )
+
+{ int stat, rv;
+ struct slm *sip = &slm_info[device];
+
+ stdma_lock( NULL, NULL );
+
+ CMDSET_TARG_LUN( slmmselect_cmd, sip->target, sip->lun );
+ slmmselect_cmd[5] = default_flag ? 0x80 : 0;
+ if (!acsicmd_nodma( slmmselect_cmd, 0 )) {
+ rv = SLMSTAT_ACSITO;
+ goto the_end;
+ }
+
+ if (!default_flag) {
+ unsigned char c = len;
+ if (!acsi_extcmd( &c, 1 )) {
+ rv = SLMSTAT_ACSITO;
+ goto the_end;
+ }
+ if (!acsi_extcmd( buffer, len )) {
+ rv = SLMSTAT_ACSITO;
+ goto the_end;
+ }
+ }
+
+ stat = acsi_getstatus();
+ rv = (stat < 0 ? SLMSTAT_ACSITO : stat);
+
+ the_end:
+ ENABLE_IRQ();
+ stdma_release();
+ return( rv );
+}
+#endif
+
+
+static int slm_get_pagesize( int device, int *w, int *h )
+
+{ char buf[256];
+ int stat;
+
+ stat = slm_mode_sense( device, buf, 0 );
+ ENABLE_IRQ();
+ stdma_release();
+
+ if (stat != SLMSTAT_OK)
+ return( -EIO );
+
+ *w = (buf[3] << 8) | buf[4];
+ *h = (buf[1] << 8) | buf[2];
+ return( 0 );
+}
+
+
+/* ---------------------------------------------------------------------- */
+/* Initialization */
+
+
+int attach_slm( int target, int lun )
+
+{ static int did_register;
+ int len;
+
+ if (N_SLM_Printers >= MAX_SLM) {
+ printk( KERN_WARNING "Too much SLMs\n" );
+ return( 0 );
+ }
+
+ /* do an INQUIRY */
+ udelay(100);
+ CMDSET_TARG_LUN( slminquiry_cmd, target, lun );
+ if (!acsicmd_nodma( slminquiry_cmd, 0 )) {
+ inq_timeout:
+ printk( KERN_ERR "SLM inquiry command timed out.\n" );
+ inq_fail:
+ acsi_end_extstatus();
+ return( 0 );
+ }
+ /* read status and header of return data */
+ if (!acsi_extstatus( SLMBuffer, 6 ))
+ goto inq_timeout;
+
+ if (SLMBuffer[1] != 2) { /* device type == printer? */
+ printk( KERN_ERR "SLM inquiry returned device type != printer\n" );
+ goto inq_fail;
+ }
+ len = SLMBuffer[5];
+
+ /* read id string */
+ if (!acsi_extstatus( SLMBuffer, len ))
+ goto inq_timeout;
+ acsi_end_extstatus();
+ SLMBuffer[len] = 0;
+
+ if (!did_register) {
+ did_register = 1;
+ }
+
+ slm_info[N_SLM_Printers].target = target;
+ slm_info[N_SLM_Printers].lun = lun;
+ atomic_set(&slm_info[N_SLM_Printers].wr_ok, 1 );
+ atomic_set(&slm_info[N_SLM_Printers].rd_ok, 1 );
+
+ printk( KERN_INFO " Printer: %s\n", SLMBuffer );
+ printk( KERN_INFO "Detected slm%d at id %d lun %d\n",
+ N_SLM_Printers, target, lun );
+ N_SLM_Printers++;
+ return( 1 );
+}
+
+int slm_init( void )
+
+{
+ int i;
+ if (register_chrdev( ACSI_MAJOR, "slm", &slm_fops )) {
+ printk( KERN_ERR "Unable to get major %d for ACSI SLM\n", ACSI_MAJOR );
+ return -EBUSY;
+ }
+
+ if (!(SLMBuffer = atari_stram_alloc( SLM_BUFFER_SIZE, "SLM" ))) {
+ printk( KERN_ERR "Unable to get SLM ST-Ram buffer.\n" );
+ unregister_chrdev( ACSI_MAJOR, "slm" );
+ return -ENOMEM;
+ }
+ BufferP = SLMBuffer;
+ SLMState = IDLE;
+
+ devfs_mk_dir("slm");
+ for (i = 0; i < MAX_SLM; i++) {
+ devfs_mk_cdev(MKDEV(ACSI_MAJOR, i),
+ S_IFCHR|S_IRUSR|S_IWUSR, "slm/%d", i);
+ }
+ return 0;
+}
+
+#ifdef MODULE
+
+/* from acsi.c */
+void acsi_attach_SLMs( int (*attach_func)( int, int ) );
+
+int init_module(void)
+{
+ int err;
+
+ if ((err = slm_init()))
+ return( err );
+ /* This calls attach_slm() for every target/lun where acsi.c detected a
+ * printer */
+ acsi_attach_SLMs( attach_slm );
+ return( 0 );
+}
+
+void cleanup_module(void)
+{
+ int i;
+ for (i = 0; i < MAX_SLM; i++)
+ devfs_remove("slm/%d", i);
+ devfs_remove("slm");
+ if (unregister_chrdev( ACSI_MAJOR, "slm" ) != 0)
+ printk( KERN_ERR "acsi_slm: cleanup_module failed\n");
+ atari_stram_free( SLMBuffer );
+}
+#endif